Drama albums contain the
audio track of the entire film, with all the dialogue, music and sound
effects. Listening to a drama album is like watching the film with your
eyes shut or listening to a radio "drama" version of the
film.

Image songs/music/poem of a film
are created based on the themes inspired by "images"
from the film's storyboard.
They were composed before the film was complete. Some
of the pieces are eventually used in the film.
An image album contains a collection of image songs/music.